Trunk-riveting machine



T. M. HOUSE-AND H. R. McCONNELLQ' TRUNK RIVETING MACHINE.

APPLICATION FILED JULY 14,1920.

7 SHEETSSHEET 1.

Q &

ii-1N N g I Elmo/M ca T.. M. HOUSE AND H. R. McCONNELLL TRUNK RIVETINGMACHINE.

APPLICATION HLED JULY 14,1920.

Patented Sept. 26, 1922.

7SHEETSSHEET 2.

and

T. M. HOUSE AND H. R. McCONNELL.

TRUNK RIVETING MACHINE. APPLICATION FILED JULY 1411920.

Patented Sept. '26, 1922.-

7 SHEETS-SHEET 3.

I 3100mm 0W6 ani T. M. HOUSE AND H. R. McCONNELL.

TRUNK R|VETING MACHINE.

ABPLICATION FILED um/14,1920.

T. M. HOUSE AND H. R. McCONNELL. TRU NK RIVETING MACHINE. APPLICATIONFILED JULY I4. 1920.

1,430,447. I v PatentedSept. 26,1922.

7 SHEETS SHEET 5.

T. M. HOUSE AND H. R. McCONNELL. TRUNK RIVETING MACHINE.

APPLICATION HLED JULY 14,1920.

1,430,447, a PatentedSept. 26,1922;

7 SHEETS-SHEET 6.

T. M. HOUSEAND H'. R. McCONNELL.

TRUNK RIVETING MACHINE. ABPUCATION FILED JULY 1.4..1920.

Patented Sept. 7 S H E ET Patented Sept. 26, 1922.

omrao STATES,

THOMAS M. HoUsEiAnn HARRY 1a. M ryann; or nrcmvroivn, vmemaassmaea T0sEwAnn TRUNK Ann BAG c'oMPANY,

RATION or VIRGINIA.

Application filed July 14,

T 0 (ZZZ to 710m it may concern Be it known that we, THoMAs M. House andHARRY R. MoCoNNnLL, citizens of the United States, residing at Richmond,in the which the following is a specification, ref-:

erence being had to the accompanying drawmgs.

This invention relates to machines for forming trunks or likecontainers, and particularly to means for riveting a binder strip overthe corner of the trunk or other container at the junction of the sideand end walls.

The general object of our invention to provide a mechanism of thischaracter which will do away with the necessity of driving andoverturning the rivets by hand and which is automatic in its action.

A more specific object is to provide a mechanism of this character inwhich the body of the trunk, which includes the side walls end walls andbottom wall, is supported upon a supporting member and an anvil. and inwhich the trunk body and the support ing member and anvil are fedintermittently a predetermined distance at each actuation of the machineso that rivets may be driven through the binding strip and the two wallsof the trunk at intervals along the joint between the end wall and theside wall of the trunk.

whereby the riveting and feeding mechanism may be thrown into or out ofengagement with the drivin means. I I

A further ob ect is to provide a presser foot which may be lowered tohold the bind ing in place upon the corner of the trunk and stretch thebinding over the stock.

Still another object istoprovide means whereby the Swing f the rivets my be or rnrnnseo'ne, VIRGINIA, A coerc- TRnitK-RWETING MACHINE.

1920. Serial nmseauo.

varied by relatively small fractions of an inch. r i

And another object is to so form the anvil by bevelling its upper face,thatthe anvil may be adjusted'to compensate for differences in thethickness of two pieces of stock. which are being riveted together atright angles to each other. I

Still another object is to provide a riveting mechanism wherein therivet is not subjected to'a sudden blow and the machine, therefore, notsubjected to the shock which'wouldbe caused by this-sudden blow on therivet, but wherein the rivet is yieldingly forced throu h the stock andoverturned.

urther object is to provide means whereby the machine'will beautomatically stopped when the riveting along one corner of the trunk isfinished. g

Other objects will appear in the course of the following description. 1

Our invention is illustrated in the accompanying drawings;.wherein:- 7 IFigure l is a side elevation of a trunk riveting machine constructed inaccordance with our invention;

Figure 2 is a side elevation looking toward the opposite side to thatshown in Figure'l;

Figure 3 is a fragmentary front end elevation of the machine; Figure 3is a top plan viewof head. Figure 4 is a fragmentary longitudinalsectional view of the rivet holdingcarrier and the head and therivetingplunger;

Figure 5 is a longitudinal section on the line 5-5 of Figure l;

Figure 6 is a vertical section through the plunger and anvil; Figure 7is a perspective view of the arms carrying the rivet holding and guidingheads; Figure 8 is a perspective view of one of the riveting holding andguidingheads;

Figure 8 is a fragmentary plan view through two coacting rivet holdingheadsg Figure 9 is a fragmentary elevation showing the meansforadjusting the rivet carrying bar; Figure 10 is a perspective view of therivet transfer bar; I s

Figure 11 is a section on the line"11 11 of Figure 10; i

Figure 12 is a perspective view" of the" latch whereby the'rivettransfer bar is'held from operation;

Figure 13 is a top plan view of the rivet transfer bar and the latchshown in Figure 12;

Figure let is a top plan view of the base for the anvil;

Figure 15 is a top plan view of the head of the anvil;

Figure 16 is an under side face view of the head of the anvil;

Figure 17 is a perspective view of the starting lever, shaft and alliedparts;

Figure 18 is a sectional view of the starting shaft and an elevation ofthe automatic stopping lever;

Figure 19 is a fragmentary sectional. view of one corner of the rivetinghead and the angular jaw supporting plate 19? and illustrating themanner in which this plate is yieldingly held in two positions;

Figure 20 is a fragmentary perspective view of the feed rack and thepawls pre venting retrograde movement of the rack;

Figure 21 is a side elevation, partly in section of the rack feedingjaws, the rack, and the means for lifting these jaws from the rack;

Figure 22 is a perspective view of the presser foot operating crankshaft, the presser foot and the means for operating the rivet drivingmechanism;

Figure 22 is a sectional view of the member 148 and the wrist pin 15 1;

Figure 23 is a perspective view of one of the rivet driving shafts;

Figure 24: is a perspective view of the rivet driving plunger;

Figure 25 is a longitudinal section through the rivet driving plunger;

Figure 26 is an elevation of the riveting tool or shank partly insection;

Figure 27 is an end elevation of the crank motion feed controlling head,the shaft being in section;

Figure 28 is a perspective view of the head and pin which fits withinthe crank disk of the feed motion;

Figure 29 is a perspective view of the slide or head and crank pin and.the parts allied therewith;

Figure 30 is a perspective view of the pawl supporting head and pawlsengaging the feed rack bar and the links extending therefrom;

Figure 31 is a side elevation of one of the rivets;

Figure 32 is a perspective view of. the feed rack bar and the guide barupon which it is mounted;

, Figure 33 is a rear elevation of the column supporting the machine.the rack bar being in section, and showing in elevation the pawls forpreventing retraction of the rack bar;

Figure is a section on the line of F gure 33;

Figure 35 is a rear elevation of the sliding yoke which holds therackbar to the guide bar, the guide bar being shown in sec.- on;

Figure 36 is a fragmentary longitudinal sectional view through the hubof the driving pulley, a portion of the driving shaft and the frictiondevice and clutch;

Figure 37 is a section on the line 37??? of Figure 36.

Figure 38 is a perspective view of the clutch pin;

Figure 39 is a section on the line 3939 of Figure 36;

Figure 40 is a transverse section of the rivet chute;

Figure 41 is a sectional view through a side and an end wall of thetrunk showing the manner in which the binding is riveted t0 the side andend walls of the trunk where the webs or walls have differentthicknesses;

Figure 42 is a like view to Figure 41 but showing the manner in whichthe rivets, engage the binding to hold the side and end of the trunktogether;

Figure 43 is a diagammatic elevation showing the manner in which theriveting mechanism illustrated in Figures 4 to 16 may be arranged forsimultaneously driving a plurality of pairs of rivets;

Referring particularly now to Figures 1, 2, and 3, it will be seen thatthe riveting machine comprises a pillar or supporting column, designated10, which is mounted upon any suitable base and extends upward to anydesired height. This column supports the entire riveting mechanism andthe trunk supports and, as illustrated in Figures 1 and 2, the column isprovided upon its forward face with a longitudinally extending beam 11,as it may be termed, supportedby or formed integral with a triangularweb 12 and a transversely extending web 13, these webs 12 and 13 formingabracket with which the beam 11 may be practically integral, and thisbracket being bolted to the column 10. The upper end 11 of the bracketis relatively thick and is adapted for the support of a longitudinalguide bar 15. The forward end of the bracket, as illustrated best inFigure 3, is formed to provide an ap proximately triangular head 16having downward and outwardly extending pro longations 17 carryinrollers 18 at their ends. The bar 15. as shown most clearly in Figure82, is rectangular in cross section and has one of its corners extendingupward and is rigidly supported at its forward and rear ends in the head16 and in the column 10. This bar 15 constitutes a guide for the trunksupporting head 19, illustrated best in Figure 32, which is providedwith a square opening 20 slidingly engaging the bar 15. This trunksupporting head 19 is approximately triangular in form, el -0W1] in ureand is provided with two forwardly extending lugs 21 disposed an angleof 45 from each other and spaced from the guide so-that adjacentportions of a corner at one end of the trunk may he disposed to rest onthe bar 15 and be held from jumping away from the bar by these lugs 21.This head 19 at its upper end is angularly bent rearward, as at 22, (seeFigure 32) and has-riveted or other wise attached to it thelongitudinally extending fee-Cl bar 23 which is formed for a port-ion ofits length with ratchet teeth 24 upon its upper and lower faces. Thistoothed portion of this feed bar passes through the column. 1.0, asshown in Figure 34.

Disposed upon the head to, as illustrated best in Figures 6, l4, and 16is the anvil. To this end the upper face of the head 16 is flattened orhorizontal, and disposed upon this face is a base plate 25 attached tothe head 16 by screws and formed 'at its center with an upwardlyextending, circular boss 26, the upper corner of which is bevelled, andthe center of which is provided with a screw-threaded opening. Dispose-dupon the upper face of this plate 25 and over this boss is the anvil 27,as illustrated in Figure 6, the annular base of this anvil being formed,as shown. in Figure 16, with four sockets 28, and the plate 25 isprovided at one point with an opening within which is disposed a balllatch 29 urged upward by a spring 30, as shown in Figure 6, which balllatch is adapted to lie-engaged in any one of the sockets 28 and to holdthe anvil turned in any one of its adjusted positions. Through thecenter of the anvil 27 passes the screw 31 which engages thescrmv-threaded opening in the boss 26 and .holds the anvil for rotativeadjustment upon the boss, as illustrated in Figures 6 and .15, and thisanvil is in the form of a truncated pyramid and is formed with fourfaces. Twoof these faces 32 have the same angle relative to the upperend face 38 of the anvil and start at the same distance from the centerscrew 31. The other two faces 34 and 35, however, while they have thesame angle with relation to the upper end face are not disposed withtheir upper margins the same distance from the center, but the face isfurther away from the center 31 of the anvil than the face 34. Thereason for this will be more particularly explained here after, but itmay be stated that where two thicknesses of material disposed at rightangles to each. other are to be riveted, the anvil is turned so that thefaces. 32 arev dis posed on each side of the longitudinal axial line ofthe machine, but where two pieces of stock of unequal thickness as inFigure 41, are to be riveted, the anvil is disposed, as illustrated inFigure 6, with the faces 34 i and 35 on each side of the longitudinaltainer is intermittently shifted along the supporting guide bar 15 andover the anvil until the riveting is completed. We will now describe themeans whereby this shifting of the trunk over the face of the'anvil issecured.

As before stated, the feed bar 23 is provided for a portion of itslength with the ratchet teeth 24, which teeth extend outward andrearward along the bar 23. Referring now to Figures 1. and 2, and toFigure 22, it will be seen that mounted in suitable bearings 36 and 37is a main driving shaft 38. The bearing 36 is mounted upon the column 10and the bearing 37 is operatively supported upona bracket 39 extendingrearward from the column 10 and then extending upward therefrom, asshown most clearly in Figures 1 and 2. This main shaft 38 is driven by adriving pulley 40 which will be later described, and the rear end ofthismain shaft 38 carries upon it a disk 41. This disk has a T-shapedslot 42extending radially or transversely across the disk, intersectingthe axis thereof, and extending beyond the axis of the disk and shaft38. Operating in this T-shaped slot is a crank pin, head or slide 43,which is approximately T-shaped to fit the slot, and is formed with anoutwardlyextending, screw-threaded pin 44 and with pointers 45 coactingwith graduations 46 on the walls of the slot. One end of this head 43 isrecessed, as at 47, to swivelly receive a head on the end of anadjusting screw 48 provided with a knurled'head 49 whereby it may bereadily rotated. This adjusting screw passes through the end wall ofthe'slot 42, and it will be obvious that by turning this adjustingscrew, the head 43 may be ad-' justed along the slot- 42 and adjusted toany desired distance from the axis of rotation of the disk 41. Thisadjusting screw 48 is held in its adjustedpositions'by meansfof a Thepin 44 is screwclamping nut 50. threaded to receive nuts, and looselymounted upon this pin is a yoke 51 which is bifurcated, as illustratedmost clearly in Figure 29, and pivoted in the. bifurcation .of this yokeis a link 52 which, at its end remote from the yoke 51, is formed toprovide a longitudinally extending slot 53 and beyond this part with alug 54. pivoted'within a knuckle 55 for lateral oscillation, Thisknuckle 55 in turn is pivoted upon a bell crank lever 56 for oscillationparallel to said lever, and the opposite extremity of the lever isformed with laterally spaced ears 57, in turn pivoted to longitudinallyextending links 58 (see Figure which are pivoted to a head 59 havingupwardly and downwardly extending pairs of ears 60, between which earsare pivoted the forwardly directed pawls 61, each of these pawls beingprovided with an inwardly extending tooth 62 at its extremity engageablewith the ratchet teeth 24 on the feed bar 23 in the manner illustratedin Figure 21. These pawls are urged towards each other by oppositelydisposed pairs of coiled springs 63. It will thus be seen that at everyrotation of the shaft 38, a reciprocation will be given to the link 52,an oscillation given to the bell crank 56, and a reciprocation given tothe head 59 and pawl 61, the stroke of this reciprocation, and as aconsequence, the length of movement given to the feed bar 23, beingdetermined by the distance of the axis of pin i4: from the central axisof the shaft 38.

If the slide 13 is disposed at the extremity of the slot 42, it isobvious that a relatively great length of reciprocation will be given tothe pawls 61 and a corresponding relatively long stroke will be given tothe feed bar 23. If, on the other hand, the slide 13 be so disposed thatthe pin as is nearly coincident with the axis of the shaft 38, it isobvious that a very small reciprocation will be given to the pawls 61and a correspond ing slight feed will be given to the feed bar 23. Thus,the distance through which the trunk body will be shifted after theplacing of each rivet and before the placing of the next adjacent rivetwill depend upon and be controlled by the adjustment of the slide 43 bymeans of the screw 4L8. The pa-wls 61 are adapted to be thrown out ofengagement with the teeth on the feed bar 23 by means which will behereafter described.

The forward end of the shaft 38 carries upon it a crank 64, to the wristpin of which is pivoted a vertical link 65, in turn pivoted in the upperend of a bifurcated head 66 (see Figure 22). This head 66, asillustrated in Figure 6, has a screw-threaded socket 67 on its underface to receive and engage with the upper end of a downwardly extendingbolt 68, the shank of which is screw-threaded to engage the socket 67and is held in adjusted position within said socket by the set nuts 69.The lower end of this bolt 68 is headed, as at 70. This bolt at itslower end enters into the counterbore of a longitudinally bored plunger71. The counterbore of this plunger is screw-threaded for engagementwith a bushing 72 provided with a head 74 whereby it may be rotatedv Ths bushing is held. by a set nut 73 This bushing has bearing upon thehead to limit the upward movement of the bolt 68, and the head it) prssion spring 75 cisposed within the bore the plunger 71. This plunger atits wcr end is rectangular in form and is to med to provide head 76which, at its lower end, has an upwardly tapering, triangular recessT'i" which extends transversely of tie head, the side walls of thisrecess being cut away as at "I The end walls of this recess conform anlarity to and are, therefore, parallel 16 upper faces of the anvil headas shown most clearly in. id q'ure 6v This pli'inger 76 constitutes apresser feet which, when lowered, bears upon the binding 0 at the cornerof the trunk and acts to stretch it over the joint while the rivetsbeing forced through the bindin and hrough the end wall and side wall orthe truni'z, the spring 75 yielding to permit a it upward movement ofthe presser foot formed by the plunger 71 having the head as the presserfoot is depressed against the work. The presser foot operates inconnection with the means for placing rivets in position on each side ofthe presser foot and with the riveting plungers, as will be laterapparent.

Secured to a forwardly projecting bracket 79 attached to the column 10is a riveting head 80, a front view of which is illustrated in Figure 3.This head 80 supports a bearing 81 for the forward end of the shaft 38,and the riveting head 80 is attached rigidly to the forward end of thisbracket 79. This riveting head, as shown most clearly in Fig ure 3, isformed on its face with a vertically extending groove 82 in which themember 66 slides. The lower end of this groove terminates in an enlargedrecess 83 opening upon the front face of the head and open at itsbottom. Just above this recess 88, the groove 82 is closed by a plate84: held in place by screws or other means to the face of the head. Thisplate terminates at the upper wall of the enlarged portion This enlarged portion 88 has vertical parallel side walls, and the head isformed with down waldly and medially extending grooves or channels 85.These channels are for the passage of the rivets, and disposed withinthese channels are the lower plates 86 of chutes 87. These chutes extendupward to the hoppers 88, these hoppers being provided with suitablefeeding mechanism enclosed in the housings 89 and operated by shafts 90.These shafts carry ratchet wheels 91, and sliding on the shafts is alongitudinally slotted arm 92 (see Figure 2) provided with a pawl 93engageable with the teeth of the corresponding ratchet 91. These arms 92are reciprocated to cause the step by step motion of the ratchet wheels91 in a manner which will be later stated. It may be sts upon a coiledcom-- rasegam each side 0 the presser foot and opening upon the lowerend of the head SO'are' bores 94 and disposed in these bores 94 are theriveting plungers 95, each one of said plungers at its lower end beingsocketed, as at 96, to receive the upper end of a riveting tool 97. Eachbore 94 is disposed slightly to one side of the guide channel or slot inplate 86. r

The outer end faces of the head 80 are grooved or channelled, as at 98,(see F igure 4') and operating in each channel and held in this channelBy a plate 99 attached to the end face of the head and, of course,extending downward and inwardly, is a rod 100. This rod is reduced inthickness at its lower end, as at 101, (see Figure 5), and swinginglymounted on the opposite faces of'the rod 100 and disposed at'its reducedportion are arms 102-which extend beyond the rod 100, are deflected at103, and at their ends carry rivet holding jaws designated generally104'. One of these rivet holding jaws is shown in detail in Figure 8;Each rivet holding jaw is recessed at 105' to receive the end of the bar102, to which it is attached by a bolt 106, and the rivet hold ing jawextends upward and inward, and the upper and inner portions of each jaware recessed to provide a longitudinally ex tending chamber 107' andenlarged at one end, as at 108, to receive the head of the rivet and theopposite end being tapered, as at 109, and terminating in a groove 110adapted to embrace the shank of the rivet when the rivet is forced outof theholde'r or carrier. The rivet is held by -these jaws 104 whichsupport the rivet carrier or holder in alignment with the riveting tool97 so that as the plunger 95 is forced downward, the rivet will beforced longitudinally through the rivet carrying jaws, the extremityofthe rivet will be forced through the grooves 110, and the head of therivet will act to spread the j aws' apart, and when the rivet holder israised from the work, the rivet will be leftin the work. The arms 102are urged towards each other by springs 11]. which surround pins 112which extend through openings 113 in the arms'and are engaged with thereduced end of the rod 100, these springs bearing against the heads ofthese screws and" against the arms and acting to urge the arms inward,but, of

course, perinittingthe arms to'open laterally away from each other'topermit the discharge of the rivet into the work; Each of therods 100isnormally raised by a spring l14which is auitached at one" end to a pin115 extending from plate-, 99, and at its other end isattached we pin116 projecting from the rod 1011241161- movable in the slot "117 formedin t-he lower end of the plate 99. Each rod 100,.it is=to be understood,will be forced downward by the impact of the riveting tool -9Znp'on thehead of'the rivet upon the descent of the plunger 95', and then upon theretraction of this plunger 95 and the rivetin'g htool 97, the spring 114will act 'to' retract-the rod 100withthe rivet holding jaws 104'. Theextent of retraction of'each rod 100 is limitedbyan adjusting screw 118mounted in asupport' 1'19 extending from the-heath 80, (see Figure 9)'this limiting screw, which forms an adjustable stop, being held in itsadjusted position by aclamp nut.120.- The extent'to whichthe rivetholding jaws 104 will be retracted will depend upon the thicknessof thework; It will be understood, of course, that: when therivetingplunger95' andtheriveting tool 97 are forced downward, that thejaws-104 and the riveting tool will operate, through the cutway portion78 of the presser foot- 7 6:-

.As-b'ef'ore remarked, the axis'of the bore '94"and;'therefore, theaxis"of the tool'97, is

slightly offset with relation to" the' line of travel ofthe' rivets 38inFigure 4, and'means isprovided for transferring-or shifting one rivet ata time from'the channel down which the rivets pass tothe position wherethe rivets. will drop into the rivet holding jaws 104. This transferringdevice comprises a transversely shiftable slide, illustrated in Figure10, and in section in Figure 4 and designated 121. This slide isprovided with a flange 122 which engages with a slot. Each slide-ismounted in a transversely extending recess 128' formed in eachdownwardly inclined, lateral wall of the recess 83' in the head. Eachslide.in its length is formed with a vertically extending, T- shapedslot124 through which a rivet can pass. One end of the slot is'formedwith avertical perforation 125, as seen in Figure 11, this perforation beingcontracted towards its middle. The slide is 'also provided upon itsvertical face with a vertically extending notch 126. Mountedin'bear'ings upon the face'ofthe' plate"84=isa'rock shaft 127 havitsockets 131, and attached toe'ach of these sockets is a-s'pring 132which extends upward from the socket; and is then formed into a coil andthen extends downward, and

at its free end is engaged in the socket 0r,

perforation 125 of the corresponding transfer bar or member 121. Thesesprings act to hold the transfer members 121 with their slots 124 out ofregistry with the tracks for the rivets in the rivet channels and inregistry with the rivet holding jaws 104, but upon the depression of thepresser foot 7 6 and its allied parts, the shaft 127 will be rocked,causing the springs to act as arms to shift the transfer bars 121 into aposi tion to receive a rivet from the rivet channels. Then as thepresser foot rises after a pair of rivets have been driven, the rockingof the shaft 127 will cause the springs, which act as arms, as beforestated, to shift the transfer bars or rivet carriers 121 outward tocarry the rivets inthe slots 124 thereof into position over thecorresponding rivet holding jaws 104 and drop the rivets therein.

Thus it will be seen that as the presser foot and its allied parts arereciprocated, a pair of rivets will be transferred from the, rivetchannels to a position over and drop into the corresponding pairs ofrivet holding jaws 104. These transfer bars or rivet transferringcarriers provide, therefore, for a feeding of the rivets one by one tothe rivet holders 104 and prevent any clog ing of these rivet carriersby the rivets feeding downward too rapidly.

The reason for using springs instead of rigid arms for reciprocating thetransfer bars or carriers 121 is that by using springs, means may beprovided fOI' hOlCling' either one or both of the transfer bars fromoperation when it is desired for any reason to stop the operation of themachine for a moment or so, either as regards both rivetplungers or oneof the riveting plungers.

To this end each transfer bar is notched, as at 126, as previouslystated, and mounted upon the outer face of the head are the latches 138,illustrated in Figures 12 and 13. Each of these latches is pivotedintermediate its ends by a screw 134 and is provided in its outer endwith a thumb piece 135, the inner end of each latch being formed with atooth 136, and below this tooth with a laterally deflected portion 137.The tooth 136 is adapted to be forced downward into engagement with therecess 126 by lifting upward on the thumb piece 135, this tooth 136preventing a too great depression of the forward end of the latch andthe part .137 preventing a too great elevation of the forward end of thelatch. Thus, when the transfer bars 121 are drawn outward, they iay belatched in their outward position, that is a position where the grooves124 are out if alignment with the rivet chutes or channels-by shiftingthe latches into engagement with the notches 126 of the transfer bars.1t will be seen that the arms 102 are disposed in recesses in the outerface of the head 80, as shown most clearly in Figure 3. and that therivet holding aws 104. are pro tected by shield strips 138 detachablyengaged with the front face of the head 80, these strips being of springmaterial to permit the lateral movement of the arms 102 and the lateralopening movement of the jaws 104.

For the purpose of operating riveting plungers 95, 1 mount upon hearingbrackets 139 on each side of the head the longitudinally extending rockshafts 140, one of which is illustrated in Figure 23. Each rock shaft atits forward extremity carries an arm 141 having a head 142 at itsextremity, this head being recessed upon its upper surface, as at 143(see Figure 25). Each plunger is pivotally connected to a yoke 144 whichembraces the head 142 and is provided with a pin, screw or other likedevice 145 which engages in the socket 143. It will be understood,therefore, that when the shaft 140 is rocked in one direction, theseplungers 95 will be forced downward, and. when the shaft is rocked inthe opposite direction, the plunger 95 will be raised. Each plunger 95is provided with a suitable drift opening 146 whereby a drift may beinserted to release the tool 97 from its engagement with the plunger 95.

Mounted upon each shaft 140 is an arm in the form of a yoke 147 adaptedfor the reception ofa bearing block 148 (see Figure 22), this bearingblock being provided with laterally projecting trunnions 149 engaging inbearings 150 in the yoke 147. This bloclr 148 has a passage extendingthrough it, and extending through this passage is a rod 151 which slidesin the passage and is provided its extremity with limiting nuts 152,This rod is attached to a knuckle 153, in turn attached to the crankpins 154 of cranks 155 and 156 on the shaft 38. A spring 57 surroundsthe rod 151 and bears at one end against the block 148 and at its otherend bears against a nut 158 having screw-threaded engagement with therod 151. By means of this nut, the tension of the spring 157 may beregulated. This spring normally forces the block 148 outward against thenuts 152, but the block may move toward the knuckle 153 and compress thespring.

It will now be obvious that as the shaft 38 is rotated, the rock shaft140 will be 0 cillated, the riveting plungers 95 will be reciprocated,and that a yielding force will be applied to the yoke-like arms 147 torock the shaft 140. The cranks 155 and 156 might be connected to theirrespective rock shafts 140 by an unyielding link, but this would cause asevere blow to be struck upon the rivets by the descent of the plungerand such a blow is inadvisible, practice having shown that it is best toforce the rivets into and through the stock by a gradually increasingpressure than by a sudden blow. As each crank moves from its neutralposition, the springs 157 will transmit rotationto the correspondingshaft 1&0, and then as the descent of the corresponding riveting plungermeets with the resistance of the rivet passing into the stock, thesprings 157 will be compressed more and more, exerting a pushing forceon the rivet plungers, which will push the rivet through and into thestock until the rivets are finally clinched, as illustrated in Figures11 and 12. Furthermore, these springs and the rods 151 permit the fullrotation of the cranks 155 and 156 with a relatively slight rockingmovement being transmitted to the rock shafts 140.

For the purpose of operating the feed ratchet operatin arms 92, I mountupon each rock shaft 1410 an arm 159, this arm being connected by a link160 (see Figure 2) and a shackle 161 to the lower arm of a bell cranklever 162, the upper arm of this bell crank lever being connected to thecorresponding arm 92.

It will now be obvious that as the shafts 1-1-0 are rocked, that theratchets which con-- trol the feed of the rivets from the hoppers to thechannels or chutes will be actuated one step, the slots in said armsembracing each shaft 90, permitting the rectilinear movement of the armsThese bell crank levers 162 are preferably mounted upon a cross shaft168 supported in brackets 16 1, these brackets in turn supporting thehoppers 88 and housings 89 in which the feed mechanism is disposed.

The main shaft 38 is driven by a pulley elO mounted upon this mainshaft, the hub 165 of this pulley being formed with a clutch recess 166,as shown in Figures 36' and 39. The main shaft is grooved, as at 167,and disposed therein is the clutch pin 168, which is angular in form andwhich is illustrated Q in detail in Figure 38, and which is forced intothe recess 166 by means of a spring 169. This pin 168 is provided with alaterally projecting head 170, the inner face of which is bevelled, asat 171. It is desirable to constantly restrain the rotation of the shaft88 by applying a friction brake thereto so that this shaft will notoverrun but will stop as soon as disconnection is effected between theshaft 88 and the driving pulley 4-6, and to this end there is mountedupon the shaft 88. and preferably adjacent to the hub of the pulley 10,an annular split shoe 172 of hard fiber, this shoe being illustrated inFigures 36, and 37. This shoe, as before stated, is split and isdisposed within a metallic split ring 17 3 which is laterally concave toembrace the shoe, this ring having outwardly projecting cars 1741 urgedtowards each other 'to contract the ring and thereby contract the splitfiber shoe by means of a spring 175 surrouiuling a pin 176 which extendsthrough the ears 17 and carries a wing nut 177 whereby the tension ofthe spring 175 may be adjusted. By turning down this wing nut, it isobvious that the spring will be compressed and this spring will act tourge the cars-174k more strongly towards each other and thus tend tocompress the fiber shoe 172. The ends of theears 174 are recessed toengage a supporting member 178 which supports this friction brake. Thispin, as illustrated in Figure 17, constitutes a rock shaft carrying uponit a blade 179 whose extremity is bevelled, this blade be ing adapted tobe inserted into position between the bevelled face 171 of the clutchmember 168 and the side wall of the ring 73, as shown in Figures 17 and86, so that when the blade is inserted, it will wedge the clutch member168 outward from its engagement with the hub of wheel 165, that is its 1engagement with the recess 16,6 therein. When the blade 179 is shiftedin a reverse direction, it will permit the clutch member to be projectedinto, the recess 166. This shaft 178 carries upon it a member 180, fromwhich depends a link 181; ll iounted in suitable bearings 182 on thecolumn 10 is a rock shaft 188 (see Figure '17), and also mounted inbearings 184 is a shaft 185 carrying an arm 186 engaged with the link181 and which at one end carries an arm 187, this arm being, connectedby a link 188 to an arm 189 mounted on the end of the shaft 183.

It will be obvious, therefore, that when the shaft 183 is rocked in a.clockwise direction, the shaft. 185 will also be rocked in a clockwisedirection, which will depress the link 181 and rock the shaft 178 in aclockwise direction, thus forcing the wedge-shaped blade 17 9intoengagement with the bevelled face 171 ofthe clutch member 168 to shiftsaid clutch member-out of its engagement with the driving pulley, andthat when the shaft 183 is rotated in the reverse direction, the bladewill be shifted from its engagement with the clutch member 168 and theshaft 38 will be. clutched to the pulley. This starting shaft 183carries upon it an operating handle which extends outward and for ward,as at 190, and then extends forward, as at 191, to the front of themachine. Also attached to the shaft 183 and adjustable around this shaftis an automatic clutch shifting or knockoff arm 192 carrying a roller193 at its end (see Figure 17). This is adapted to be engaged by ashifting finger 194 (see Figure 32) mounted upon a post 195 on the feedbar 23, thisfinger being bevelled or rounded downward at its forward endand being yieldingly supported by a spring 196extending upward frointhelug 22 of the head or plate 19. Now when the feed bar 28 has. movedforward. to its full extent, this knock-off finger 1941- will engage theroller and lift this roller, thus rotating the arm 192, and rockingshaft 183 in a counter-clockwise direction, thus shiftingthe clutchblade 179 into engagement with the clutch pin or membe- 168 and shiftingit out of engagement with the driving pulley 165, thus automaticallydisconnecting the shaft 38 from the driving pulley. It will be seen thatby giving the shaft 183 a clockwise rotation through the handle-191, theblade 179 will clutch the shaft to the driving pulley and that a reversemotion given to the knock-oil arm 192 will unclutch the shaft anddriving pulley and that this unclutching of the shaft and driving pulleyis automatic in its action when the feed bar has moved to its fullextent.

In order to permit the feed bar 23 to be shifted backward to its initialposition after one trunk has been riveted or whenever desired, it isobviously necessary to disengage the pawls 61. To the end of openingthese pawls 61 when the machine is stopped and thus putting the parts insuch position that the rest 19 may be shifted upon the bar 15 to anydesired position, I attach to the upwardly extending portion of bracket39, as illustrated in Figure 2, the sliding plate 197, shown in detailin Figure 17, this plate being slotted, as at 198, for the passage of abolt or screw 199 upon which the plate slides, and this plate beingprovided with an angularly extending portion 200 and with forwardlyprojecting ears 201. The angularly projecting portion 200 has a centralopening 202 for the passage of the feed bar 23 and above and below thisopening and projecting forwardly therefrom are the lingers 203, theouter faces of which are reduced for a portion of their length, at 204,and terminate at their inner ends in bevelled faces 205. When theextremities of these blades or fingers 203 engage the inwardly extendedextremities of pawls 61, as in Figure 21, it is obvious that they willlift these pawls from their engagement with the teeth of the feed bar23. When these fingers are retracted, the thin portions 204 of thefingers lie rearward of the toothed extremities of the pawls 61. It willbe seen that there are two positions for the plate 197 and, therefore,for the fingers 203, and the plate or slide 197 is yieldingly held inthese two positions by ball latches 206 forced into recesses 207 in theinner face of plate 197 by springs 208 (see Fig. 19).

The plate is automatically shifted to one or the other of its twopositions by the rocking of shaft 188. This is accomplished by providinga short transverse shaft 209 mounted in a bearing 210, which shaftcarries upon it the upwardly projecting arm 211 connected by a link 212to the ears 201 .remity this shaft is provided with a forwardlyextending arm 213 connected by a link w to the 187. There fore, as thisarm 18'! is raised, the shaft 209 will be rocked in the direction of thearrow in Figure 17 and the slide 197 will be carried rearward, and onthe other hand, when the shaft 183 is retired in a clockwise directionby the knock-off arm 192, the shaft 209 will be rocked in a reversedirection to that of the arrow in Figure 17, thus pulling the slide 197forward and inserting the fingers between the pa-wls 61 and the teeth 24on the feed bar 23.

Dogs are provided for preve ting the re verse movement of the feed bar23, and these dogs are illustrated in Figure 20 and designated 215 and216. These dogs extend vertically upward and are disposed parallel toeach other and are of different thicknesses, each dog being formed witha bevelled face upon its upper end. The dogs extend at their lower endslaterally, as at 217, and are urged upward by springs 218. They arecapable of being depressed by an arm 219 notched at its forward end toengage over the laterally projecting lugs 217, this arm 219 beingmounted upon the shaft 209, as shown in Figure 17. It will be seen fromFigure 34; that the pawls are of different thicknesses in order that oneof the pawls may always engage fully against a ratchet tooth on theunder side of the feed bar 23 *ithout regard to the adjustment of thefeed mechanism. This rack bar, as illustrated, passes through a: passage220 in the column 10 and the pawls are held in proper position by aplate 221 attached to the face of the column 10, this plate beingvertically slotted, as at 222, for the reception of the toothedextremity of the arm 219.

In Figure ll we show the side board or web a of a trunk X or container,and at show the end board of the trunk. These boards are shown as havinglayers of paper or pasteboard on their outer and inner surfaces orlayers of veneer or any other suitable material. 0 designates thebinding which extends over the joint at the corner of the end board withthe side board. The side and end boards of the trunk and the bot tomboard (as shown in Figure 12) are initially nailed to each other so thata box-like body is formed, open of course on one side where the cover isto be hinged. The mechanism for riveting the binding strips connectingthe side boards to the bottom board is disclosed and claimed in aseparate application filed by us June 2st, 1920, Serial :t'c396,109, themechanism which we have described being for the purpose of riveting endboards and side boards to the binding strips at the joints of the sideand end. boards. It will be seen from Figure 41 that the bottom board isrelatively thick in comparison with the end boards and that the rivetswhich pass into the bottomboard do not go entirely therethrough. Inactual practice, however, the cleft ends of the rivets expand by a wedgeof wood or like material being formed in advance of the rivet: as ,it isforced inward, and this acts to expand the rivet, as shown in Figure 41,Thus it is only necessary to have one size of rivets for the side boardand the end board. The rivets, of course, pass entirely through the endboard and are expanded against the anvil itself. As shown in Figure 42,the side boards and end boards are of the same thickness and, therefore,both sets of rive-ts are expanded against the anvil.

The detailed operation of the various parts of this mechanism have beenheretofore referred to, but the general operation is as follows :-lfitis desired, for instance, to rivet the binding strip to the corner orjoint between the side and the end of the trunk, the anvil is arrangedas in Figure 6. The COIltI'OlllIlg handle 191 is depressed, whichrotates the shaft 183 in a direction which will disengage the drivingpulley from shaft 38 and which will cause the fingers 203 to lift up thepawls 61 from their engagement with the rack teeth 24 of the feed bar28. This leaves the feed bar free to be shifted rearward so as to carrythe supporting head 19 to the rear end of the guide bar 15. The cornerof the open end of the trunk is then disposed over the guide bar 15 withits edges underneath the lugs 21. Now at this time it is necessary thatthe supporting head 19 and the trunk should be so adjusted with relationto the anvil 2"? that the first pair of rivets shall be driven a certainspaced distance from the outer corner of the trunk, this distancedepending upon the predetermined distance of the pairs of rivets fromeach other. lVe have, therefore, provided for this adjusting purpose astop screw or like element 223 (see Figures 1, 2, and 3), which screw223 is to be adjusted outward or inward so as to engage the bottom ofthe trunk and thereby control the distance between that wall of thetrunk which extends parallel to the face of the anvil support 16 and theaxis of the anvil. As before stated, this distance depends upon thepredetermined spacing of the rivets. This is a very important feature ofthe invention, as by its means the rivets are started properly spacedfrom the forward end of the work.

After the trunk or other'container has been put in place over the anviland engaged with the supporting head 1 *9,,the lugs 21 preventing anytipping up of the trunk or container, the lever 191 is thrown upward,which acts to retract the slide 197 and consequently retract thefingers-208 from engagement with thepawls 61 and at the same rivets.

time lift the plunger 219 to permit the upward movement of the pawls'215 and 216 into engagement with the lower teeth on the bar 23 and atthe same time this movement "as before described. the riveting proceedsautomatically. The rotation of shaft 38 causes the intermittentdepression of the pressor foot 7 6 and the intermittent feed of rivetsto the rivetzholding heads orjaws 104 and the intermittent depression ofthe riveting plunger's. As soon as the riveting plunger-s have beenlifted after driving one pair of rivets, the crank 41- operates to shiftthe feeding bar 23 forward-one inch and the operation. is repeated for asecond pair of This continues until the rear end of the trunkorcontainer reaches the anvil, and after the last pair of rivets have been'driven, the arm194 on the forward end of the feed bar 23 engages thearm 192 to rotate the shaft 183 in a counterclockwise direction tothereby disengage the clutch between shaft 88 and the driving pulley 40and at the same time disengage the pawls 61 fromtheir engagementwith theteeth 24.

Then, as before stated, the supporting head! 19' is shifted to itsrearm-os't position and if new work is to be done, the adjusting screw223 is adjusted and thework continued.

While we have heretofore described a machine in which the trunk orcontainer is fed step by step rearward past a single riveting head andsingle anvil so that pairs of rivets are successively driven, yet we donot Wish to be limited to this, as it is obviously possible to provide aplurality of riveting heads and anvi'ls disposed at'intervals, asillustrated in Figure 43, so that a pluralty of pairs of rivetsnlay beplaced" and overturned at one time. Thus, in Figure 48 we illustrate aseries of four anvils 2? and a series of four riveting heads 80, eachriveting head being constructed in exact accordance with the mechanismhereto-fore described for the riveting head 80, and We have illustratedthese anvils as i being mounted upon an elongated member 16 a guide bar15, and a supporting head 19, this supporting head instead of beingmoved only one step, however, will be shifted back a distance normallyequal to four pairs of rivet spacings at one time; Thus, four pairsof'rivets will be driven at one time, as in Figure 43, and then thetrunk or container fed forward to receive four more rivets. WVe have notconsidered it necessary to show the details of construction in Figure43, as

these are precisely the same as those heretofore described- H e By themechanism heretofore described it placed within is possible to veryreadily place the binding strips 0 between the side and end boards andrivet these strips in place with a minimum of labor and with an accuracywhich is not possible with hand work. It will be seen that if any rive-tis misplaced or not properly overturned, the rivet feeding mechanism anddriving mechanism on one side or the other or both sides may be cut outof operationby the latches 133 so that the feed of the container may bereversed to carry it back to the position where the faulty rivet occuredand new rivets driven.

As before remarked, the rivet is driven not by a blow driving the rivetsuddenly through the stock, but by a gradually increasing pressure whichforces the rivet through the stock and overturns the shank of the rivet.It -will be found in actual practice that this is preferable to drivinthe'rivet suddenly through, as the shock and jar to the machine isgreat, and further the wood or other stock is apt to be cracked orbroken or a plug driven out bythe sudden driving in of the rivet. Byreason of the spring 157, no jar is communicated to the machine when therivet is forced inward, and as a consequence the machine operateseasily, steadily, and with a minimum of wear. The machine is adjustableto trunks or containers of various sizes and withstock of variousthicknesses and the rivets may be of each other or spaced apart f, ormore,if desired, depending upon the size of the disk 4-]. and the rangeof adjustment of the slide 43 therein.

We claim 1. A rivet driving mechanism of the character describedincluding an anvil, rivet driving mechanism disposed above the anvil,

- means for supporting work upon the anvil,

means on the anvil for adjustably predeter- 1 m ning the distance fromthe end of the work at which the first rivet shallbe driven, means forintermittently feeding the work over the anvil in one direction, meansfor actuating the rivet driving mechanism while the work is stationary,and means for stopping the feeding and rivet driving mechanism when thework has travelled a predetermined distance over the anvil.

2. A rivet driving mechanism of the character described including ananvil, rivet driving mechanism disposed above the anvil, means forsupporting work upon the anvil, means on the anvil for predetermiw ingthe distance from the end of the work at which the first rivet shall bedriven, means for int rmittently feeding the work over the anvil in onedirection, means for actuating the rivet driving mechanism while thework is stationary, means for stopping the feed ing and rivet drivingmechanism when the work has travelled a predetermined distance over theanvil, and means for adjusinsane? tably varying the distance which thework moves on each feeding operation.

3. .a. riveting machine including an anvil, riveting mechanism disposedabove the anvil, means for supporting and intermittently feeding thework in one direction over the anvil in one direction, means for automatically causing the operation of the rivet driving mechanism when thework is stationary, means for automatically stopping the rivet feeding21115 rivet driving mechanism when the work has moved a predetermineddistance over the anvil, and an adjustable stop carried upon the anviland adjustably limiting the distance between the end of the work and theanvil.

4. A rivet driving mechanism including a supporting column, a supportcarried by said column, a fixed anvil mounted upon said support, acarriage movable toward and from the anvil and having a container supporting portion disposed on a level with the anvil, power operated meansfor shifting the carriage toward the anvil, rivet driving means disposedover the anvil, power operated carriage feeding mechanism acting to givean intermittent step by step movement to the carriage, power operatedmeans for operating the rivet driving mechanism, and means acting toautomatically disconnect the rivet driving mechanism and the carriagefeeding mechanism from the source of power when the carriage has movedtowardthe anvil a predetermined distance.

5. A riveting mechanism of the character described including an anvilhaving downwardly divergent faces, a'supporting rod extending from theanvil and having downwardly and laterally inclined faces in the sameplane as the inclined faces of the anvil, and container supporting meansslidinglv mounted upon said rod, the anvil having downwardly divergentportions adapted to support the sides of the trunk and having wheels.

6. riveting mechanism of the character described including a fixed anvilon which work may be supported, a vertically reciprocatable presser footdisposed above the anvii and movable toward and from the anvil, theanvil having oppositely inclined faces, the under face of the presserfoot being recessed to correspond with said inclined faces, means forfeeding rivets into position above the inclined faces of the anvil, andmeans for simultaneously pressing the said rivets through the work andagainst the inclined faces of the anvil.

7. A riveting mechanism of the character described including an anvil,means for supporting work upon the anvil, means for supporting a rivetin position over the work, means for yieldingly forcing said rivetthrough the work and against the anvil including a rock shaftoperatively connected to the-plunger and having an arm, a power operatedshaft having an arm, a connecting rod extending from the last named armto the first named arm, a sliding member operatively connected to thelast named arm and slidingly mounted upon the connecting rod, and aspring yieldingly resisting movement of the sliding member as the powershaft is operated but transmitting power to the arm on the rock shaft tocause the oscillation of the latter.

8. A riveting mechanism of the character described including an anvil,means for supporting work on the anvil, a power shaft, a presser footdisposed above the anvil and operatively connected to the power shaft tocause a vertical reciprocation of the presser foot upon a rotation ofthe power shaft, a riveting plunger coacting with the anvil and work, arock shaft operatively con nected to the riveting plunger to reciproecate it upon an oscillation of the rock shaft, means for giving anoscillation to the rock shaft comprising a crank arm on the power shaft,a connecting rod extending from the crank arm, a sliding member mountedon the connecting rod, an arm on the rock shaftto which the slidingmember is operatively connected, and spring resisting movement of thesliding member as the power shaft is rotated.

9. A riveting mechanism of the character described including an anvilhaving oppositely inclined faces, means for supporting work on saidanvil, means for alternately shifting the work over the anvil andstopping the motion of the work, oppositely disposer rivet holders oneach side of said anvil, means for feeding rivets one by one to saidrivet holders, and means for forcing the rivets into and through thework and against the anvil comprising oppositely disposed plungers, rockshafts operatively connected to said plungers to cause theirreciprocation, a power operated shaft, and opera tive connectionsbetween the power operated shafts and each of said rock shafts wherebyto cause the oscillation of the rock shafts for each rotation of thepower operated shaft. v

10. A riveting mechanism of the charac ter descriliied including ananvil having oppositely inclined faces, means for supporting work onsa'd anvil, means for alternately shifting the work over the anvil andstopping the motion of the work, oppositely disposed rivet holders oncam side of said 'anvil. means for feeding rivets one by one to saidrivet holders, means for forcing the rivets into and through the workand against the anvil comprising oppositely disposed plungei's, rockshafts operatively connected to said plunger-s to cause theirreciprocation, a power operated shaft having crank arms, rodsoperatively connected to into the work.

the crank arms and extending to arms on the rock shafts, membersslidably mounted 11. Ariveting mechanism of the character describedincluding an anvil, a support therefor upon which the anvil is rotatablymounted for rotation in a horizontal; plane, the anvil havingtwoinclined faces, the upper ends of which are spaced equi-distantly fromthe center of motion. of the anvil for use with box sides of the samethickness, and two inclined faces, the upper ends of which are disposed,one close to the center of motion of the'anvil and one'i'elativelyremotetherefrom for use with box sides of different thicknesses, and means forholding the anvil in rotatably adjusted positions with relation to itsaxis.

12. A riveting mechanism of the character described including, an anvilsupport, an

anvil rotatably mounted upon said support and rotatably adjustable withrelation there; to, said anvil having four inclined faces, all of saidinclined faces having the same angle,

two of saidinclined faces being 'equi-distantly spaced from thei'otative'axis of the anvil so that they may be used with box sides ofthe same thickness, and the other two inclined faces being'f disposedunequidistantly from said rotative axis so that they maybeused withbox'sides of different thicknesses.

13. In a riveting macliine,ai1 anvil having inclined faces, amembervertically reciprocatable toward and from the anvil, a presser foot caried by saidmember and having limited sliding movement with relationthereto, means for adjusting the presser foot toward and from the anvil,means'yieldingly urging the presser foot toward the anvil, and meanslimiting the movement of i the presser foot'toward said reciprocatingmember.

14. A riveting mechanism including a fixed anvil, a rivet holdercoacting with the anvil and comprising two arms resiliently urged intoparallel relation, said arms at their extremities having two ofi setjaws formed to loosely support a rivet between them, a riveting plungerreciprocatable' parallel to the arms and through the space hetween saidjaws and toward and from the anvil, means for feeding rivets one by oneinto the space between said jaws when the aws are closed including arivet holding chute down which rivets move by gravity.

a. reciprocatable transfer member having a slot to receive said rivetsfrom thechute,

said membe shifted to carry its slot the, he; positing a rivet in saidholder, a rivet drivi plunger reciprocatable through said rivet holderand toward or from the anvil, power operated means for reciprocating therivet driving-plunger and the transfer member, and means forholding thetransfer member from operation by said power operated means.

15. A riveting mechanism including an anvil, a rivet holder co ctingwith the anvil and comprising two arms resiliently urged into parallelrelation, said arms at their extrcn'iities having two jaws formed toloosely sup or rivet between them, a riveting pl 7 r recii 'n'ocatablethrough the space between said jaws and toward and from the anvil, meansfor feeding rivets one by one into the space between said jaws when thejaws are closed including a rivet holding chute down which'rivets moveby gravity, :1 reciprocatable transfer member having a slot to receivesaid rivets from the chute, said member, when shifted to carry its slotover the holder, depositing a rivet in said holder, a rivet drivingplunger reciprocateble through said rivet holder and toward or from theanvil, power opera-ted means for reciprocating the rivet driving plungerand the transier member, means for holding the transfer member fromoperation by said power operated means including a resilient armoperatively engaged with the transfer member, means for oscillating saidarm to thereby reciprocate the transfer member, and a latch shift-ableto hold the transfer member from reciprocation.

16. A riveting mechanism including an anvil, a rivet holder coaotingwith the anvil and comprising two arms resiliently urged into parallelrelation, said arms at their extremities having two jaws formed toloosely support a rivet between them, a riveting plunger reciprocatablethrough the space between said jaws and toward and from the anvil, meansfor feeding rivets one by one intothe space between said jaws when thejaws are closed including a rivet holding chute down which rivets moveby gravity, a reciprocatable transfer member having a slot to'receivesaid rivets from the chute, said member, when shifted to carry its slotover the holder, depositing rivet in said holder, a rivet drivingplunger reciprocatable through said rivet holder and toward or from theanvil, power operated means for reciprocating the rivet driving plungerand the transfer member, means for holding the transfer member fromoperation by said power operated means including a vertically movable,power operated, constantly reciprocatable member, a shaft operativelyconnected thereto and rocked thereby, a resilient arm extending fromsaid shaft to the transfer member and causing the reciprocai ,asogi ivtic-n of the latter, and a latch holding the transfer member fromreciprocation by said resilient arm.

17. In a riveting machine, a work supporting anvil, a verticallyreciprocating presser foot coacting therewith, oppositely disposed rivetholders disposed on each side of the anvil and directed toward tne anviland each including a pair of jaws resiliently urged towards each other,each rivet holder being mounted for longitudinal movement toward fromthe anvil, a spring urging the rivet holder away from the anvil, meansfor feeding rivets automatically to the rivet holders, a pair ofplung'ers, each coacting with one of said rivet holders andreciprocatahle through said rivet holders and to "'ard and from theanvil, and when in en gagement with the rivet and moving toward theanvil, carrying the rivet holder toward he anvil, and upon a rearwardmovement permitting the reciprocation of the rivet iolder, poweroperated means for reciprocal' g the presser foot feeding rivets to therivet holders and reciprocating said rivet driving plungers, andmanually controlled m ans for preventing the feeding of rivets to therivet holders.

18. A riveting machine including a work supporting anvil and a presserfoot coacting therewith, said presser foot comprising a body having alongitudinally extending bore screw-threaded for a portion of itslength, a sleeve screw-threaded in said bore, plunger nember slidingthrough said sleeve and having a head at its inner end,

spring disposed within the bore and bearing against the head, and a yokeadjustably mounted upon the extremity of said plunger memoer and actingto limit the movement of the plunger member relative to the sleeve.

19. A riveting mechanism of the character described including asupporting column having an outwardly projecting bracket on one face, awork supporting anvil mounted upon said bracket and having oppositelyinclined faces, a supporting rod extending rearward from the worksupporting anvil to the column, and container supporting means slidablymounted upon said rod,

20. A riveting mechanism of the character described including asupporting column having an outwardly projecting bracket on one face,work supporting anvil mounted upon said bracket and having oppositelyinclined faces, a supporting rod extending rearward from the worksupporting anvil to the column, and container supporting means slidablymounted upon said rod, the anvil being provided with downwardlydivergent arms carrying rollers at their lower ends.

21. A riveting mechanism of the character described including a worksupporting anvil, a supporting bar extending from the anvil, meansslidably mounted upon said bar for supporting one end of a piece of workupon the bar and holding the work in position over the an vi, means forgiving intermittent longitudinal movement "to said work support ingmeans including a power operated shaft, acrank pin mounted upon saidshaft for transverse adjustment relative to the axis of the shaft, arearwardly extending bar connected to the work supporting member andhaving ratchet teeth on opposite faces, a pawl carrier slidably mountedupon thebar and having oppositely disposed, spring actuated pawlsengaging the ratchet toothed bar upon a forward movement of the car rierand sliding over the ratchet teeth upon a rearward movement of thecarrier, and means operatively connecting the wrist pin and said carrierto cause a reciprocation of the carrier upon a rotation of the wristpin.

22. A riveting machine including a riveting anvil, riveting mechanismassociated with the anvil, a supporting bar extending from the anvil, aWork Support slidably mounted upon said bar and movable toward or fromthe anvil, means for giving the work support a step by step movementtoward the anvil comprising a ratchet toothed bar carried by the worksupport, a pawl carrier 00- acting with the bar and a resilientlyactuated pawl carried thereby and engaging the bar, means forreciprocating said pawl carrier comprising a power operated shaft havinga transversely slotted head on one end, a member adjustable in said headnearer to or further from the axial center of the head and having awrist pin, and an operative connection between said wrist pin and thepawl carrier to cause the reciprocation of the latter upon a rotation ofthe wrist pin around its axial center 23. A riveting machine including awork supporting anvil, a work support and holder movable toward theanvil to carry the work over the anvil, riveting mechanism asso ciatedwith the anvil, mechanism for inter mittently shifting the work supporttoward the anvil and including a longitudinally extending bar extendingfrom the work support and having ratchet teeth, a pawl carrier throughwhich said bar passes, a resiliently actuated pawl mounted thereon andengaging the ratchet teeth upon'a movement of the pawl carrier in onedirection but riding over the ratchet teeth upon a movement of the pawlcarrier in an opposite direction, power operated means for reciprocatingsaid pawl carrier, and means for automatically releasing the pawl fromits operative engagement with the ratchet bar upon the arrival of thework support at a predetermined posi tion with relation to the anvilcomprising a member longitudinally shift-able through the pawl carrierinto position between the pawl and the teeth but normally retracted fromsaid position, and a member opera vely n te o sa d le g tuclin lly h ft:able member and actuated to shift the lon'gi tudinally shiftable memberto disengage the pawl and shifted by the arrival of thef'work holder inengagement with said last named member. i

24:. A riveting machine of the character 'described"comprising fixedsupporting anvil and guide bar extending therefrom, a trunk supportingmember movable over-' said guide bar toward and from the anvil, rivetingmechanism associated with the an vil,n1echanism for giving a step bystep movement to the work support, a driving shaft, operative"connections between the driving shaft and the riveting" mechanism, apo'vver operated driving member for the power shaft normally out ofengagement therewithfmeans operatively connected to the power shaftforcausing the "step by'ss step forward movement of the trunk holder, amanually operable member shifta'ble'in one direction f to operativelyconnect the driving member to said driving shaft to transmit powerthereto and, when moved to in the other direction, to operativelydisconnect the driving member from 116 driving shaft, mechanismconnected to the driving shaft for giving step by step movement to thetrunk holder, and means connected as to said member for operativelydisconnect ing the said step by step mechanism from the trunk holderwhen said member 18 shifted to disconnect the driving member from thedriving shaft. 7 ion 25. A riveting machine of the character describedcomprising a fixed'supporting anvil and guide bar extending therefrom, atrunk supporting member movable over said guide bar toward and'from theanv l, riveting mechanism associated with the anvil, mechanism forgiv-ing a step" by step movement to the work support, a driving shaft,operative connections between the driving shaft and the rivetingmechanism, a power operated driving member for the power shaft normallyout of engagement therewith, means operatively connected to the powershaft for causing thestep by step forward movement of the trunk holder,a manually operable member shiftable in one direction to operativelyconnect the driving member to said driving shaft to transmitpowerthereto and, when moved in the other direction, to operativelydisconnect the driving member from the driving shaft, mechanismconnected to the driving shaft for giving a step by step movement to'thetrunk holder, means connected to said member for operativelydisconnecting the sa d step by step mechanism from the trunk holder whensaid member is shifted to d sconnect the driving member from the driv ngshaft, and means for automatically causing the shifti g efsa tl memberin a direct on to 13

